Questions[smplayer](ubuntu)

Each time I go to about:support and click on "Open Directory", Firefox opens it with SMPlayer and then mpv/mplayer complains about :

  Playing: /home/sebastien/.mozilla/firefox-esr/empty6/persdict.dat
Failed to recognize file format.
Exiting... (Errors when loading file)

So I've searched "smplayer" in about:preferences#applications but couldn't find it.

I've also searched for "smplayer" in about:config but couldn't find it either.

And finally I've searched in the XDG mimes types definitions :

$ xdg-mime query filetype ~/.mozilla/firefox-esr/empty6/persdict.dat
text/plain
$ xdg-mime query default text/plain
kate.desktop
$ xdg-mime query filetype ~/
inode/directory
$ xdg-mime query default inode/directory
dolphin.desktop

EDIT 0 : Adding a few xdg-open commands :

$ xdg-open ~/.mozilla/firefox-esr/empty6/persdict.dat
Fontconfig warning: ignoring C.UTF-8: not a valid language tag
$ pgrep -af /persdict.dat
32659 /usr/bin/kate -b /home/sebastien/.mozilla/firefox-esr/empty6/persdict.dat
$ xdg-open Documents
Fontconfig warning: ignoring C.UTF-8: not a valid language tag
$ pgrep -af /Documents
8437 /usr/bin/dolphin --icon system-file-manager -caption Dolphin /home/sebastien/Documents

EDIT 1 : inode/directory= entry in ~/.local/share/applications/mimeapps.list :

$ grep inode/directory= ~/.local/share/applications/mimeapps.list
inode/directory=dolphin.desktop;smplayer.desktop;kde4-dolphin.desktop;vlc.desktop;caja-2.desktop;kde4-kfmclient_dir.desktop;kde4-gwenview.desktop;easytag.desktop;nemo.desktop;audacious-qt.desktop;Thunar-folder-handler.desktop;qmmp_cue.desktop;audacious.desktop;kde4-k4dirstat.desktop;pcmanfm.desktop;qmmp_dir.desktop;qmmp_enqueue.desktop;
inode/directory=dolphin.desktop

EDIT 2 : The Dolphin application launcher is not found by Firefox because it's in the kde4 subfolder of /usr/share/applications/ :

$ locate /dolphin.desktop
/usr/share/applications/kde4/dolphin.desktop

Explanation : Firefox couldn't find dolphin.desktop in /usr/share/applications/, therefore it was using the next entry for inode/directory mimetype in ~/.local/share/applications/mimeapps.list file which was smplayer.desktop :

$ grep inode/directory= ~/.local/share/applications/mimeapps.list
inode/directory=dolphin.desktop;smplayer.desktop;kde4-dolphin.desktop;vlc.desktop;caja-2.desktop;kde4-kfmclient_dir.desktop;kde4-gwenview.desktop;easytag.desktop;nemo.desktop;audacious-qt.desktop;Thunar-folder-handler.desktop;qmmp_cue.desktop;audacious.desktop;kde4-k4dirstat.desktop;pcmanfm.desktop;qmmp_dir.desktop;qmmp_enqueue.desktop;
inode/directory=dolphin.desktop

Solution : Thanks to ashvatthama's anwser : To solve this pb., you can type this command :

xdg-mime default kde4-dolphin.desktop inode/directory

and now it works fine :

$ pgrep -af /empty6
29083 dolphin --icon system-file-manager -caption Dolphin /home/sebastien/.mozilla/firefox-esr/empty6

I've seen this bug for years, I'd love to solve it.

Can you help me ?

I tried streaming a movie from online to VLC, the computer froze after a while. I tried playing a local movie in VLC, the computer froze after a while. I tried playing a local movie in SMPlayer, the computer after a while.

Every time the computer froze, the image froze and I couldn't do anything (couldn't switch to a any program, I tried a bunch of shortcuts such as Ctrl+Alt+F1)but the sound kept on playing.

The computer would freeze after a random amount of time, but the only way I could unfreeze it is by holding the power button until the computer shut down.

I even tried updating the repositories by doing sudo apt-get update/upgrade but it didn't do anything.

My computer: Ubuntu 18.04.1 with FDE R5 2500u 8GB DDR4 dual channel MX200 500GB SSD 1080p screen

I also had this laptop as dual boot Ubuntu and Windows for a while, without any issues. I did a fresh install to utilise full disk encryption.

If someone can provide me with help on how to solve this issue, it would be much appreciated.

Here is my VLC log:

-- logger module started --

main: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.

main: playlist is empty

-- logger module started --

main: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.

main: playlist is empty

glconv_vaapi_x11 error: vaInitialize: unknown libva error

-- logger module stopped --

-- logger module started --

main: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.

main: playlist is empty

glconv_vaapi_x11 error: vaInitialize: unknown libva error

-- logger module stopped --

-- logger module started --

main: Running vlc with the default interface. Use 'cvlc' to use vlc without interface.

main: playlist is empty

glconv_vaapi_x11 error: vaInitialize: unknown libva error

Ubuntu 18.04. Well familiar with SMplayer over several years. when I try to use it now, the video opens in a second window with no controls. I have to click on the SMplayer window to operate controls and then the video hides and I have to click to bring it back. The second window is not resizeable. I saw a similar question with over 300 views, but the answer given as a possible one does not work. I have searched the web and SMplayer forums, but can find nothing. Last ditch effort as i may have to give up as SMplayer is useless with this issue.

When opening the file SMPlayer restores the position at which the file was closed.

How to turn that off so that it always opens the file at the beginning?

Today I noticed I can't download subtitles using SMPlayer, it worked couple days ago, when I try to download subtitle I get this error:

Download failed: Moved Permanently

Is there a fix for this?